Many thanks to those who have helped. I now LOVE my car again. One of my fathers car's is a 95 e320...I switched radiator caps and went for a drive, ac on, and ac off. No water out....seems that it was just the cap (as soon as I took it off it over flowed)! I will be going to the dealer to buy a new cap and the pink mercedes radiator fluid. Thank you again to those who have helped me, it is much appreciated.